The strength of the magnetic field at the centre of a current carrying circular coil depends on
the radius of the coil
the number of turns in the coil
the strength of the current flowing in the coil
The strength of the magnetic field at the centre of a current carrying circular coil depends on
1) radius of the coil - It is inversely proportional to the radius of the coil, more the radius, less is the strength of the magnetic field.
2) number of turns in the coil - It is directly proportional to the number of turns in the coil, more the turns in the coil, more is the strength of the magnetic field.
3) strength of the current flowing in the coil - It is directly proportional to the strength of the current flowing in the coil, more the strength of the current flowing, more is the strength of the magnetic field.